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A used centrifuge is a machine that uses centrifugal force to accelerate the separation of different substances that need to be separated. It has a wide range of applications in chemical industry, petroleum, food, mineral processing, water treatment and shipbuilding. The main principle of the second-hand sedimentation centrifuge is to generate strong centrifugal force through high-speed rotation of the rotor to accelerate the sedimentation rate of different specific gravity components (solid or liquid phase) in the mixture, so as to separate the sample with different sedimentation rates and buoyancy density.
The suspended matter in the charging cylinder forms a ring liquid
layer under the action of centrifugal force, and the solid
particles settle on the drum wall to form a sediment. The clarified
liquid is discharged through the overflow port or suction pipe and
is called the separation liquid. Finally, the sludge is discharged
manually or mechanically. When the solid particles settle to the
drum wall, they also move axially with the flow of the liquid. When
the feed is too much, the fine particles that have not settled to
the drum wall are discharged with the separation liquid, and the
separation liquid is cloudy. For difficult separation suspension
with small solid-liquid density difference, small solid particles
and large liquid viscosity, sedimentation centrifuges with high
separation factor should be selected to extend the time of
suspension at the drum (for example, reducing the feed amount or
using a long drum, etc.) in order to ensure the clarification of
the separation liquid.
The precipitation centrifuge is widely used, especially for
centrifugal filtration because the solid particles in the
filtration medium are easy to block the filtration medium and the
filtration resistance is too large, or there are too many particles
to separate the suspension, but the moisture content of the
sediment is high.
Sedimentation centrifuges can be used for the separation of
crystals, chemical sediments, coal and other suspensions,
dewatering of various sewage sludge and slagging of animal and
plant oils.